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LimeBest ResponseYou've already chosen the best response.1
Alternate Interior angles are congruent when lines are parallel. Use Angle Addition Postulate.
 one year ago

LimeBest ResponseYou've already chosen the best response.1
\[m \angle ABD+m \angle CBD=m \angle B \]
 one year ago

LimeBest ResponseYou've already chosen the best response.1
\[\angle B \approx \angle D \]
 one year ago

LimeBest ResponseYou've already chosen the best response.1
Or \[\angle A \approx \angle C\]
 one year ago

LimeBest ResponseYou've already chosen the best response.1
I'm guessing you might have figured that out yourself. The key phrase is 'Alternate Interior angles are congruent when lines are parallel.'
 one year ago

computergeek123Best ResponseYou've already chosen the best response.0
yeah. haha So like what else do I need to write to prove they are congruent?
 one year ago

computergeek123Best ResponseYou've already chosen the best response.0
I searched all through the lesson and I can't find where they say Angles. I only do the sides! ?
 one year ago

LimeBest ResponseYou've already chosen the best response.1
It's a property of parallelograms. That statement is really enough proof as it is. I would back that statement up with the diagram and equations; if the question pushes for more information.
 one year ago

computergeek123Best ResponseYou've already chosen the best response.0
SO write "Alternate Interior angles are congruent when lines are parallel."??
 one year ago

LimeBest ResponseYou've already chosen the best response.1
Opposite angles are congruent because correspondent angles on congruent triangles are congruent. Yes, Alternate Interior angles are congruent when lines are parallel. The question is referring to angles.
 one year ago
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